Suspicious Nun

Alright, listen up, buttercup. So, a nun is doing sit-ups in a cucumber field. Why is that weird? Nuns are supposed to be all holy and whatnot, not pumping iron in a veggie patch. And cucumbers? Well, they're kinda phallic-shaped, so it adds a layer of naughty to the whole thing. It's unexpected and a bit cheeky, which is why it's funny, you dense cabbage.